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Circuit Protection

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Deligo GS1/10M-1 0.4mm-1.0mm Grommet PE Strip - 10 metres 1

0.4mm-1.0mm Grommet PE Strip – 10 metres

3 In stock
More available within 1-3 working days*
SKU: GS1/10M-1
£5.60
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Europa ECLR01 Europa Latching Relay - 1P C/O 16A 12-240V AC/DC

Europa ECLR01 Latching Relay – 1P C/O 16A 12-240V AC/DC

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This item cannot be back-ordered
SKU: ECLR01
£17.35
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Europa ECPF05 Europa Phase Failure Relay - 10A 220-460V AC Adjustable Phase Loss / Sequence Under and Over Voltage

Europa ECPF05 Phase Failure Relay – 10A 220-460V AC Adjustable Phase Loss / Sequence Under and Over Voltage

1 In stock
This item cannot be back-ordered
SKU: ECPF05
£25.62
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Europa GZS92-BLACK Europa 5 Pin Slimline Low Profile Relay - 1P CO 12A 300V AC

Europa GZS92-BLACK 5 Pin Slimline Low Profile Relay – 1P CO 12A 300V AC

1 In stock
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SKU: GZS92-BLACK
£3.55
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WCED WAC4P25NC/24 WCED 4 Pole 25A 24V Normally Closed AC Contactor 1

WCED 4 Pole 25A 24V NC Normally Closed AC Modular Contactor

4 In stock
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SKU: WAC4P25NC/24
£13.49

3-£13.15£0.34£13.49
5-£12.82£0.67£13.49
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20-£12.14£1.35£13.49
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Wago 788-303 Wago 788 Relay Module with 1 Changeover Contact - 12V DC 16A 2.5 mm² Grey 1Wago 788-303 Wago 788 Relay Module with 1 Changeover Contact - 12V DC 16A 2.5 mm² Grey 2

Wago 788-303 Relay Module with 1 Changeover Contact – 12V DC 16A 2.5mm² Grey

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SKU: 788-303
£8.75
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FuseBox TPN16FB Fusebox TPN16FB 16 Way 125A Three Phase Board 1FuseBox TPN16FB Fusebox TPN16FB 16 Way 125A Three Phase Board 2

Fusebox TPN16FB 16 Way 125A Three Phase Board

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SKU: TPN16FB
£265.11
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FuseBox MT10D061 FuseBox MT10D061 6A Single Pole 10kA D Curve MCB

FuseBox MT10D061 6A Single Pole 10kA D Curve MCB

11 In stock
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SKU: MT10D061
£3.22
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Fusebox Consumer Unit MCB D Type

FuseBox MT10D162 16A Double Pole 10kA D Curve MCB

5 In stock
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SKU: MT10D162
£6.68
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Fusebox Consumer Unit MCB D Type

FuseBox MT10D322 32A Double Pole 10kA D Curve MCB

11 In stock
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SKU: MT10D322
£6.68
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FuseBox MT10C503 FuseBox MT10C503 50A Triple Pole 10kA C Curve MCB

FuseBox MT10C503 50A Triple Pole 10kA C Curve MCB

6 In stock
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SKU: MT10C503
£9.88
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FuseBox MT10D103 FuseBox MT10D103 10A Triple Pole 10kA D Curve MCB

FuseBox MT10D103 10A Triple Pole 10kA D Curve MCB

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SKU: MT10D103
£9.51
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FuseBox RTA102530B FuseBox RTA102530B 25A 30mA 10kA B Curve Type A RCBO

FuseBox RTA102530B 25A 30mA 10kA B Curve Type A RCBO

14 In stock
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SKU: RTA102530B
£17.44
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FuseBox ARCDLKTPN Fusebox ARCDLKTPN 4 Pole TPN RCD Link Fitting Kit

Fusebox ARCDLKTPN 4 Pole TPN RCD Link Fitting Kit

3 In stock
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SKU: ARCDLKTPN
£6.50
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FuseBox IT1004U Fusebox IT1004U 100A 4 Pole Din Rail Connector

Fusebox IT1004U 100A 4 Pole Din Rail Connector

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SKU: IT1004U
£22.50
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Live Electrical ENC0565 Live Electrical 5 Way Enclosure IP65 H:185 x W:130 x D:110mm

Live Electrical ENC0565 IP65 5 Way Enclosure

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SKU: ENC0565
£15.65
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Surge Devices 10811/LEDENCM Surge Devices 10811/LEDENCM 3 Phase SPD Type 1+2+3 100kA with Full Mode Protection & LED Indication in IP65 Polycarbonate Enclosure

Surge Devices 10811/LEDENCM Type 1+2+3 SPD – 3-Phase Lightning Arrester with 63A MCB in IP65 Enclosure for TN-S & TNC-S Systems

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SKU: 10811/LEDENCM
£642.06
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Surge Devices 800914ENC Surge Devices Type 1+2+3 100kA 3 Phase SPD with Window Indication and Pluggable Modules in IP65 Polycarbonate Enclosure

Surge Devices 800914ENC Type 1+2+3 SPD – 3-Phase Lightning Arrester in IP65 Enclosure

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SKU: 800914ENC
£553.50
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Surge Devices 10020/2ENCM Surge Protection Devices 10020/2/ENCM

Surge Devices 10020/2ENCM Type 1+2+3 SPD – Single-Phase 25kA Lightning Arrester in IP65 Enclosure with 63A MCB

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SKU: 10020/2ENCM
£217.71
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Surge Devices SY12350KA4P/ENC Surge Devices Type 1+2+3 50kA 3 Phase Lightning and Surge Arrester with Window Indication in IP65 Polycarbonate Enclosure

Surge Devices SY12350KA4P/ENC Type 1+2+3 50kA 3 Phase SPD with Indication in IP65 Enclosure

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SKU: SY12350KA4P/ENC
£394.83
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Selection of Consumer Units, TPN Distribution Boards, Circuit Protection, Rotary Isolators, Meter Tails, Fused Switches and Accessories.

18th Edition Consumer Units with built in SPD Surge Protection Device, stand alone SPD units, PEN loss, PME fault detection consumer units, Consumer units relocation boxes/kits, Three phase distribution boards with built in SPD and main switch.

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Circuit protection in the UK is governed by the wiring regulations outlined in the British Standard BS 7671. This standard, also known as the IET Wiring Regulations, sets out the requirements for the design, installation, and maintenance of electrical installations in the UK. Circuit protection is a crucial aspect of electrical installations to ensure the safety of people and property.

Here are some key aspects of circuit protection according to BS 7671 and the devices commonly used in the UK market:

  1. Circuit Breakers: Circuit breakers are essential devices for protecting electrical circuits. BS 7671 specifies requirements for the selection and installation of circuit breakers. They come in various types, including:
    • Miniature Circuit Breakers (MCBs): MCBs are commonly used to protect individual circuits. They trip when there’s an overload or a short circuit.
    • Residual Current Devices (RCDs): RCDs are designed to protect against electric shock. They disconnect the circuit if they detect an imbalance in current, indicating a fault.
    • Combination RCD/MCB Devices: These devices combine the functions of both MCBs and RCDs in a single unit. They are often used for socket outlets.
  2. Fuses: While less common in modern installations, fuses may still be used for circuit protection. They work by melting when there’s an excess current, breaking the circuit.
  3. Overcurrent Protection: BS 7671 requires that circuits are protected against overcurrents. This is typically achieved through the use of circuit breakers, fuses, or other protective devices.
  4. Earthing and Bonding: Proper earthing and bonding are essential for safety. This ensures that in the event of a fault, the fault current is safely directed away from people and property.
  5. Surge Protection: Surge protection devices may be required to protect against voltage surges or lightning strikes, especially for sensitive electronic equipment.
  6. Arc Fault Detection: In certain installations, arc fault detection devices may be used to detect and disconnect circuits in the presence of dangerous arc faults.
  7. Circuit Isolation: BS 7671 also specifies requirements for circuit isolation devices such as switches and isolators.
  8. Cable Sizing: The standard provides guidelines for selecting the correct cable size to ensure that the cables can safely carry the intended load without overheating.
  9. Circuit Labels and Documentation: Proper labeling and documentation of circuits are important for maintenance and safety. BS 7671 outlines requirements for labeling and record-keeping.

It’s important to note that regulations and standards may be updated over time, so it’s essential to consult the latest version of BS 7671 and any local regulations or codes that may apply to your specific location or type of installation. Additionally, electrical work should be carried out by qualified and competent electricians to ensure compliance with safety standards.

 

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